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WPEDA Flange-Mounted Double Speed Worm Gear Reducer — Motor-Direct Two-Stage Drive for Ultra-High Ratio Compact Process Equipment
When a large food processing machine, pharmaceutical vessel, or continuous industrial mixer requires a combined ratio of 1/200–1/900 from a direct motor-mounted drive — without the coupling alignment complexity of indirect drive arrangements — the WPEDA flange-mounted double speed worm gear reducer is the engineered answer. The IEC motor flange at the first-stage input eliminates the coupling between motor and gearbox, while the two-stage worm gear cascade delivers the extreme speed reduction that no single-stage product can achieve.
Accepting motors from 0.12 kW to 5.5 kW across 9 size groups (40-70 through 155-250 mm combined centre distance), the WPEDA covers the full range of motor-direct two-stage applications from small laboratory stirrers to large industrial agitator vessels. Five shaft-direction positions (A–E) ensure integration flexibility. Motor flange dimensions comply with IEC 60034-7. O Ever-power | Request a Motor Compatibility Check
Technical Specifications
Full dimensional and motor flange data. LA=flange OD; LB=pilot OD; LC=bolt circle; LE=bolt count; LZ=bolt size. Input hole: Q, U, T×V. Output shaft: LS, S, W×Y. Reference input speed 1500 r/min. All dimensions in mm.
| Size | Power(kW) | Ratio | A | AB | BB | BE | HL | LL | H | HA | HB | M | N | E | F | G | Z | LA | LB | LC | LE | LZ | Q | U | T×V | LS | S | W×Y | Wt(kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 40-70 | 0.12 | 1/200–1/900 | 314 | 153 | 131 | 75 | 110 | 140 | 236 | 70 | 50 | 150 | 190 | 115 | 150 | 20 | 15 | 115 | 95 | 140 | 4 | M8 | 31 | 11 | 4×12.8 | 60 | 28 | 7×4 | 19 |
| 50-80 | 0.18 | 314 | 144 | 142 | 83 | 130 | 160 | 268 | 80 | 65 | 170 | 220 | 135 | 180 | 20 | 15 | 115 | 95 | 140 | 4 | M8 | 31 | 14 | 4×12.8 | 65 | 32 | 10×4.5 | 27 | |
| 60-100 | 0.37 | 1/200 | 337 | 175 | 169 | 91 | 160 | 200 | 336 | 100 | 75 | 190 | 270 | 155 | 220 | 25 | 15 | 130 | 110 | 160 | 4 | M8 | 33 | 14 | 5×16.3 | 75 | 38 | 10×4.5 | 45 |
| 70-120 | 0.37/0.75 | 1/300–1/400 | 445/425 | 193 | 190 | 109/111 | 190 | 240 | 430 | 120 | 90 | 230 | 320 | 180 | 260 | 30 | 18 | 130/165 | 110/130 | 160/200 | 4 | M8/M10 | 40/42 | 14/19 | 5×16.3/6×21.8 | 85 | 45 | 12×4.5 | 75 |
| 80-135 | 0.75/1.5 | 1/500–1/600 | 499 | 226 | 210 | 125 | 215 | 270 | 480 | 135 | 105 | 250 | 350 | 200 | 290 | 30 | 18 | 165 | 130 | 200 | 4.5 | M10 | 48/52 | 19/24 | 6×21.8/8×27.3 | 95 | 55 | 16×6 | 103 |
| 100-155 | 1.5 | 1/800 | 570 | 269 | 252 | 148 | 235 | 290 | 531 | 135 | 130 | 275 | 390 | 220 | 320 | 35 | 21 | 165 | 130 | 200 | 4.5 | M10 | 52 | 24 | 8×27.3 | 110 | 60 | 18×7 | 147 |
| 120-175 | 2.2/3.0 | 1/900 | 631 | 287 | 255 | 181 | 280 | 335 | 600 | 160 | 155 | 310 | 430 | 250 | 350 | 40 | 21 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 110 | 65 | 18×7 | 204 |
| 135-200 | 3.0/4.0 | 630 | 318 | 319 | 202 | 310 | 375 | 666 | 175 | 185 | 360 | 480 | 290 | 390 | 40 | 24 | 215 | 180 | 250 | 5 | M12 | 63 | 28 | 8×31.3 | 125 | 70 | 20×7.5 | 298 | |
| 155-250 | 5.5 | 815 | 380 | 385 | 247 | 355 | 450 | 800 | 200 | 203 | 460 | 560 | 380 | 480 | 45 | 28 | 265 | 230 | 300 | 5 | M12 | 83 | 38 | 10×41.3 | 155 | 90 | 25×9 | 470 |
* Motor power ranges are for representative matched IEC motors. HA and HB = front/rear housing height offsets. LA, LB, LC = IEC flange dimensions per IEC 60034-7. Multiple motor sizes separated by /.
Product Structure — IEC Flange + Two-Stage Worm Cascade
The WPEDA housing integrates an IEC motor flange at the first-stage worm shaft input — the motor shaft slides directly into the keyed input bore, eliminating the coupling entirely. The two-stage worm cascade then reduces the motor speed through two sequential gear meshes, delivering the ultra-high reduction ratio at the solid output shaft. This creates a compact motor + two-stage gearbox assembly with no intermediary coupling components.
| Input | IEC 60034-7 motor flange + keyed input bore — motor direct, no coupling |
| Stages | Two worm-and-wheel pairs in series; combined ratio 1/200–1/900 |
| Motor Range | 0.12 kW (size 40-70) to 5.5 kW (size 155-250) |
| Housing | FC25 cast iron; elongated two-stage body with IEC flange at input end |
| Output | Solid shaft with keyway; 5 direction positions (A–E) |
| Motor Compat. | IEC standard IE2/IE3 motors and Y/Y2 Chinese series |
✅ Key Features & Benefits
Motor-Direct + Ultra-High Ratio — Unique Combination
The WPEDA uniquely combines IEC direct motor mounting (no coupling) with two-stage ultra-high ratio reduction (1/200–1/900). This means the entire drive chain from motor to process shaft contains no coupling elements, while achieving the extreme reduction ratios that food processing, pharmaceutical, and industrial stirrer applications require. Keywords: motor-direct double speed worm gearbox, IEC flange two-stage worm reducer.
IEC Flange Eliminates Alignment Complexity
Two-stage gearboxes are longer and heavier than single-stage units — making coupling misalignment a more significant concern. The WPEDA IEC flange eliminates this issue entirely by placing the motor shaft directly in the input bore, under the constraint of the precision pilot register, without any separate coupling alignment step.
Two-Stage Precision for Ultra-Low Process Speeds
Both worm pairs are ground to ISO 1328 Grade 7 tolerances. For food processing, pharmaceutical, and chemical stirrer applications requiring very slow, highly controlled output speeds (1/200–1/900 of motor speed), the two-stage precision provides smooth, uniform rotation free from gear-induced velocity variations.
Wide Motor Power Range — 0.12 to 5.5 kW
Nine size groups accept motors from 0.12 kW (size 40-70, light laboratory stirrer applications) to 5.5 kW (size 155-250, large industrial vessel drives). This span covers the vast majority of motor-direct two-stage drive requirements within the food, pharmaceutical, and chemical processing industries.
Five Output Shaft Directions
Standard positions A through E accommodate horizontal, inclined, and various angled output shaft orientations — providing the same installation flexibility as the foot-mount WPEA series within the motor-direct WPEDA format.
FC25 Cast Iron Body for Industrial Durability
The elongated two-stage FC25 cast iron housing delivers the impact resistance and vibration damping characteristic of the WPE series, ensuring long service life in food processing environments subject to vibration from adjacent equipment, wash-down operations, and thermal cycling.
Industry Applications
The WPEDA is the compact motor-direct solution for two-stage ultra-high ratio drives in food, pharmaceutical, and precision process applications:
Large Food Processing VesselsDough mixers, sugar syrup blending vessels, and food ingredient agitation tanks requiring very low impeller speeds (1/400–1/900) from a compact, hygienic motor-direct two-stage drive.
Pharmaceutical ManufacturingPharmaceutical batch reactor agitators, granulator vessel drives, and blending equipment requiring precise ultra-low speed control from a compact IEC-flange two-stage unit in GMP environments.
Cosmetics & Personal CareLarge cream and lotion mixing vessel drives, blending paddle machines, and emulsification equipment requiring ultra-slow impeller speeds from a compact motor-direct two-stage drive.
Agricultural & Food StorageLarge-scale grain aeration agitator drives, feed mixing vessel motors, and post-harvest processing equipment requiring very low output speeds from motor-direct two-stage units.
Specialty Chemical ProductionPolymerisation reactor agitators, specialty adhesive mixing vessels, and fine chemical synthesis reactors requiring controlled ultra-low impeller speeds from compact motor-direct drives.
Light Industrial AutomationSlow-turning indexing table drives, precision positioning auxiliary drives, and industrial timer/controller mechanisms requiring reliable very-low-RPM output from compact motor-direct two-stage units.
Quality Control & Certification
ISO 9001:2015 & CE
Full ISO 9001:2015 QMS. CE Declaration of Conformity per shipment. IEC flange dimensions CMM verified to IEC 60034-7. Two-stage gear mesh checks cover both worm pairs. Pharmaceutical GMP documentation packages available on request.
Two-Stage Run & Flange Test
Each WPEDA undergoes: (1) IEC flange concentricity check (≤0.05 mm TIR); (2) noise test (≤75 dB(A)); (3) oil seal integrity at full two-stage torque; (4) output torque within ±5% of rated specification. Combined test duration: 45 minutes at rated input speed.
Material Standards
Housing: FC25 cast iron (≥250 MPa). Both worm shafts: 20CrMnTi (≥58 HRC). Both wheel rims: ZCuSn10Pb1 tin-bronze. Food-grade lubricant compatibility confirmation available for USDA/FDA machine documentation on request.
Why Choose Ever-power for WPEDA Double Speed Gearboxes
We supply WPEDA motor-direct two-stage gearboxes to food processing OEMs, pharmaceutical equipment builders, and specialty chemical vessel manufacturers in Germany, Mexico, Singapore, Australia, and over 60 countries. Our combined two-stage verification and IEC flange concentricity check ensures that every WPEDA unit delivers correct motor shaft engagement AND correct two-stage gear performance before leaving our facility.
- ✅ IEC flange CMM + two-stage mesh verification — combined check, every unit
- ✅ Food & pharma GMP documentation available for machine compliance packages
- ✅ Custom input bore sizing for non-standard IEC motor shaft diameters
- ✅ Motor frame compatibility service — we confirm motor fit before production
- ✅ 20+ years export record — Germany, Mexico, Singapore, Australia and beyond
⭐ Customer Reviews
“We use WPEDA units on our large dough mixing vessel drives. The 1/600 ratio gives us the very slow impeller speed our recipes require, and the IEC flange motor mounting eliminates the coupling alignment we struggled with previously. The two-stage drive is compact enough to fit within our vessel top-plate constraints. Excellent quality from Ever-power.”
Sandra K., Process Equipment Engineer
Food Processing Equipment OEM, Queensland, Australia
“We integrate WPEDA gearboxes into our pharmaceutical reactor vessel drives. The IEC flange accommodates our standard TEFC motors directly and the 1/900 ratio achieves the ultra-slow impeller speeds our GMP processes require. Two-stage output is smooth and consistent. Consistent quality across multiple batch orders. Sehr gut.”
Klaus H., Applications Engineer
Pharmaceutical Equipment Builder, Munich, Germany
“We use WPEDA-80/135 units at 1/500 ratio on our specialty chemical blending vessels. The motor-direct IEC flange mount keeps the drive compact within our vessel top structure, and the two-stage ratio handles the slow-speed requirements of our viscous products. Reliable supply and good technical support from Ever-power.”
Pedro M., Design Engineer
Chemical Vessel Equipment, Monterrey, Mexico
“WPEDA gearboxes on our large cream mixing vessel drives. The 1/400 ratio achieves very low impeller speeds for our viscosity-sensitive products, and the IEC flange mount keeps the assembly compact in a clean-room environment. Good quality product, reliable delivery to Singapore, and responsive technical team.”
Jason T., Plant Manager
Cosmetics Manufacturing, Singapore
❓ Frequently Asked Questions
How does the WPEDA differ from the single-stage WPDA?
The WPDA achieves ratios of 1/5–1/60 with IEC direct motor mounting. The WPEDA achieves 1/200–1/900 — far higher ratios — also with IEC direct motor mounting. Both eliminate the input coupling. The WPEDA is longer and heavier due to the two-stage housing, but delivers the extreme reduction ratios required for ultra-slow process equipment that the WPDA cannot reach.
What is the maximum motor power for the WPEDA?
The maximum matched motor power is 5.5 kW for size 155-250. Size 40-70 accepts 0.12 kW, size 50-80 accepts 0.18 kW, rising through the size range. These are the maximum matched motor powers for rated operation — lighter motors can always be used, but will produce lower output torque. Contact us for a precise motor-to-gearbox matching calculation for your specific application.
Can the WPEDA be used with variable-speed drives (VSDs)?
Yes — the WPEDA is compatible with VSD (inverter) operation. For continuous low-speed VSD duty below 30 Hz input, note that TEFC motor cooling reduces proportionally with speed. For continuous two-stage operation at low VSD frequencies, consider the WPEDS (finned variant) which provides additional thermal headroom for the combined motor and two-stage gearbox heat load.
What lubricant is required for the WPEDA two-stage housing?
Same as the WPEA: ISO VG 320 mineral gear oil (ambient 15–60°C) or ISO VG 460 for elevated temperatures. The two-stage housing has a shared oil bath at a higher volume than single-stage equivalents. Change at 100 operating hours first service, then every 2,500 hours. Apply anti-gall grease to the motor shaft before insertion as specified in the WPD series installation guide.
Is the WPEDA available with food-grade lubricant factory-fill?
Yes — on request, we can factory-fill WPEDA units with NSF H1 registered food-grade gear oil suitable for incidental food contact applications. This is available for the food processing industry as an optional item at order placement. Specify ‘food-grade lubricant’ in your purchase order or enquiry.
Motor-Direct Ultra-High Ratio Drive — Get WPEDA Quote Today
Whether your food mixer needs 1/400 or your pharmaceutical reactor requires 1/900, the WPEDA delivers motor-direct two-stage reduction in the most compact possible package. Get a free motor compatibility check and selection calculation from our engineers.
